Daniel Bryan revealed in an interview with Cheap Heat that WWE doesn’t like him talking about environmental issues because it’s political. 

“There’s a lot of things that I’m not allowed to talk about on television. And it’s weird, because if you noticed the last several months, I haven’t said much about the environment because they have told me I’m no longer allowed to talk about the environment. Why? Because they say that the environment is a political issue.

You know what? The environment is not a political issue, it’s a scientific issue and saying it’s a political issue makes it stupid. What an idiotic idea!”